the liquid metal, mercury, bromine, liquid non metal, mercury, Bromine, conduct electricity, metals, non metals, mixture of two or more metals, compound, alloy, by increasing the number of valence electrons the melting point, increase, decrease, which metal has higher melting point, alumenium, sodium, salts musn't contain, hydroxide, chlorine, strong acid, sulphoric acid, sulphorous acid, weak alkaline, ammonium hydroxide, sodium hydroxide, conduct electricity well, weak acid, strong acid, phosphate group, PO4, SO4, carbonic acid, H2CO3, HCO3, most of them exist in solid state except one, metals, non metals

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